I don't remember how much a wrench does, but I do remember it to be 15% or something like that.
so if there was a command called: mp_turret_upgrade
then
mp_turret_upgrade 150 (which would mean 10 hits.)
for supplies it would be the same pretty much
mp_supply_upgrade 150
If you decline this request, a lot of people will be wondering why. I think fruitpapje (or some clan like that) TGV, FaTaL, LaG, have already taken away damage in RPG Launchers. For armor, I don't think they can do this.